cfi_flash: fix flash on BE machines with CFG_WRITE_SWAPPED_DATA

This got broken by commits 93c56f212c
 [cfi_flash: support of long cmd in U-boot.]

That command needs to be in little endian format on BE machines
with CFG_WRITE_SWAPPED_DATA. Without this patch, the command 0xf0
gets saved on stack as 0x00 00 00 f0 and 0x00 gets written into
the cmdbuf in case portwidth = chipwidth = 8bit.

Cc: Alexey Korolev <akorolev@infradead.org>
Cc: Vasiliy Leonenko <vasiliy.leonenko@mail.ru>
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>

drivers/mtd/cfi_flash.c

@@ -306,6 +306,9 @@ static void flash_make_cmd(flash_info_t *info, u32 cmd, void *cmdbuf)
 	int i;
 	int cword_offset;
 	int cp_offset;
+#if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
+	u32 cmd_le = cpu_to_le32(cmd);
+#endif
 	uchar val;
 	uchar *cp = (uchar *) cmdbuf;
 
@@ -313,7 +316,7 @@ static void flash_make_cmd(flash_info_t *info, u32 cmd, void *cmdbuf)
 		cword_offset = (info->portwidth-i)%info->chipwidth;
 #if defined(__LITTLE_ENDIAN) || defined(CFG_WRITE_SWAPPED_DATA)
 		cp_offset = info->portwidth - i;
-		val = *((uchar*)&cmd + cword_offset);
+		val = *((uchar*)&cmd_le + cword_offset);
 #else
 		cp_offset = i - 1;
 		val = *((uchar*)&cmd + sizeof(u32) - cword_offset - 1);